1. Department of Urology, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
2. Department of Urology Miyazaki Prefectural Miyazaki Hospital Miyazaki Japan
3. Department of Urology National Hospital Organization Kyushu Cancer Center Fukuoka Japan
4. Department of Urology Kyushu Central Hospital Fukuoka Japan
5. Department of Urology Harasanshin Hospital Fukuoka Japan
6. Department of Urology Saga‐ken Medical Centre Koseikan Saga Japan
7. Department of Urology Japanese Red Cross Fukuoka Hospital Fukuoka Japan